Improvement in millstone-dressing devices



s. ROSS. MILLSTONE-DRESSING DEVI CE. 193,554.

Patented July 24, 1877.

Fig.1

' i e @EMM N-PETERS, PHOTO-YLITHOGRAFHFJQ, WASHINGTON. D C.

1 '1 FFIGE.

SIMON ROSS, OF CINCINNATI, OHIO, ASSIGNOR TO HIMSELF AND GEORGE A.VANDEGRIFT,

OF SAME PLACE.

IMPROVEMENT IN MlLLSTONE-DRESSING DEVICES.

Specification forming part of Letters Patent No. 193,554, dated July 24,1877; application filed July 29, 1876.

To all whom it may concern:

Be it known that 1, SIMON Ross, of Cincinnati, in the county of Hamiltonand State of Ohio, have invented certain new and useful Improvements inMillstone or Burr Dressing Devices, of which the following is aspecification:

My invention relates to machines for dressing millstones; and consists,first, in mount ing a suitable tool-holder upon parallel slides or ways,in such a manner as to cause a rack attached to the tool-holder, and,during the return stroke of said holder, to engage with a cog-wheelcontrolling a feeding device, and thus change the lateral position ofthe toolholder into the desired position for the next cut; secondly, ina device for releasing the feed-screw from the nut through which itworks, when it becomes desirable to change the lateral position of thetool, without going through the slow process that would be necessary ifthe screw were not released.

In the accompanying drawings, Figure 1 is a plan view of a machineembodying my invention. Fig. 2 is a sectional elevation of the same,taken through line a b on Fig. 1. Fig. 3 is a partial sectionalelevation, representing the tool-holder as engaged with the feedingdevice; and Fig. 4 is a sectional elevation taken through line 0 d onFig. 1.

Similar letters of reference denote the same parts in each of thefigures.

A is a frame, having two of its sides parallel, with straps B and Bbolted thereto, upon which slides a cross-head, O, the strap B beingadjustable for the purpose of taking up lost motion caused by wear onthe straps B B, or on the cross-head 0. Upon the slide B, which is apart of the cross-head C, is a sliding block, Q, to which is attached atoolholder, consisting of an operating-lever handle, F, pivoted at R,the motion of which is limited by the slot K and pin L, subject to anice adjustment by the set-screw J; a toolsocket, S, for the receptionof the cuttingtool; and, finally, attached to one side of thetool-socket, a rack, E.

ing one hand upon the Journaled to the cross-head O is a screwbolt, G,which works in a screw-box,-H. Upon the screwbolt G is firmly secured afeedwheel, D.

The operation of the machine is briefly described as follows: The frameA is placed upon the stone to be dressed, with the slide B parallel withthe desired line of cut. The operator locates himself near the side B,reststrap B, and, with the handle F, moves the slide-block Q and thetool located in the socket S to the desired point of cut, with the pointof the tool resting on the stone to be cut, with the depth of cutregulated by the set-screw J. The slideblock Q is forced forward by thehandle F, and the tool in socket S grooves the stone to the desireddepth. On the return stroke, the handle F, being pivoted at It, raisesthe point of the tool from the stone, and with it the rack E, to thedesired height for the said rack to engage with the feedwheel D, andcause the screw-bolt G to move in the screwbox H, and thus change thelateral position of the tool into the desired position for the next out.

When it becomes desirable to make any considerable change in the lateralposition of the tool, or when the cross-head 0 has been fed up as far aspracticable, the screw can be released from the screw-box H by raisingthe lever N, which is pivoted to the movable part of the box H, and thehook part of the lever N is removed from the projection at P, formingpart of the stationary half of screwbox H, and the movable half of saidscrewbox, being pivoted at 0, is raised from the screw G, which is thenfree to move through the lower half of the screw-box, it being free fromthreads.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a diamond millstone-dresser, the sliding block Q, to which ispivoted a tool-holder, having its vertical motion limited, and r 7adjustable by the slot K and pin L, with rack E, arranged to communicatewith and lever- N, Substantially as and for the purchange the positionof the feeding device, subpose specified.

stantially as and for the purpose specified. In testimony whereof I havehereunto set 2. As applied to a millstone-dresser, the my hand this 20thday of July, 1876.

screw-box H, divided through its center, the SIMON BOSS.

partTsbeing secured to the frame. A, and Witnesses:

the movable part pivoted to the same at O, HENRY'MiLLWARD,

and arranged to be lockedtogether by the I JNo. P.'MUR-PHY.

